TABLE 4.

Histopathological condition index I_h of Mytilus galloprovincialis exposed to experimental concentrations of ASA. The values are presented as the means ± SD (n = 3). Significant differences compared with the control value set as p < 0.05 (*) are shown. ASA1 (ASA 10 μg L⁻¹) and ASA2 (ASA 100 μg L⁻¹).

Organ	Reaction pattern	Exposure time (days)	Test groups
			Control	ASA1	ASA2
				(10 μg L−1)	(100 μg L−1)
Digestive gland	Tubule alterations	0	0.028 ± 0.0	0.07 ± 0.01*	0.03 ± 0.02*
		10	0.07 ± 0.0	0.38 ± 0.02*	0.54 ± 0.04*
		20	0.03 ± 0.01	0.24 ± 0.04*	0.46 ± 0.03*
	Intertubular tissue changes	0	0.03 ± 0.01	0.03 ± 0.02*	0.02 ± 0.0*
		10	0.03 ± 0.01	0.30 ± 0.10*	0.355 ± 0.03*
		20	0.04 ± 0.0	0.25 ± 0.03*	0.37 ± 0.0*
Gills	Cellular and morphological changes	0	0.013 ± 0.05	0.012 ± 0.01*	0.017 ± 0.015*
		10	0.06 ± 0.013	0.20 ± 0.01*	0.26 ± 0.01*
		20	0.082 ± 0.010	0.21 ± 0.01*	0.33 ± 0.019*